refactor: 重构限流系统和健康监控，支持按 API 格式区分

- 将 adaptive_concurrency 重命名为 adaptive_rpm，从并发控制改为 RPM 控制
- 健康监控器支持按 API 格式独立管理健康度和熔断器状态
- 新增 model_permissions 模块，支持按格式配置允许的模型
- 重构前端提供商相关表单组件，新增 Collapsible UI 组件
- 新增数据库迁移脚本支持新的数据结构

src/services/usage/quota_scheduler.py

@@ -96,8 +96,6 @@ class QuotaScheduler:
                         logger.info(f"Resetting quota for provider {provider.name}")
 
                         provider.monthly_used_usd = 0.0
-                        provider.rpm_used = 0  # 同时重置RPM计数
-                        provider.rpm_reset_at = None
                         provider.quota_last_reset_at = now
                         reset_count += 1
 
@@ -126,8 +124,6 @@ class QuotaScheduler:
                 provider = db.query(Provider).filter(Provider.id == provider_id).first()
                 if provider and provider.billing_type == ProviderBillingType.MONTHLY_QUOTA:
                     provider.monthly_used_usd = 0.0
-                    provider.rpm_used = 0
-                    provider.rpm_reset_at = None
                     provider.quota_last_reset_at = now
                     db.commit()
                     logger.info(f"Force reset quota for provider {provider.name}")
@@ -140,8 +136,6 @@ class QuotaScheduler:
                 )
                 for provider in providers:
                     provider.monthly_used_usd = 0.0
-                    provider.rpm_used = 0
-                    provider.rpm_reset_at = None
                     provider.quota_last_reset_at = now
                 db.commit()
                 logger.info(f"Force reset quotas for {len(providers)} providers")

src/services/usage/recorder.py

@@ -93,6 +93,10 @@ class UsageRecorder:
         if metadata.original_model and metadata.original_model != metadata.model:
             target_model = metadata.model
 
+        # 非流式成功时，返回给客户端的是提供商响应头（透传）+ content-type
+        client_response_headers = dict(metadata.provider_response_headers) if metadata.provider_response_headers else {}
+        client_response_headers["content-type"] = "application/json"
+
         await UsageService.record_usage(
             db=self.db,
             user=self.user,
@@ -115,6 +119,7 @@ class UsageRecorder:
             request_body=request_body or result.request_body,
             provider_request_headers=metadata.provider_request_headers,
             response_headers=metadata.provider_response_headers,
+            client_response_headers=client_response_headers,
             response_body=result.response_data if isinstance(result.response_data, dict) else {},
             request_id=self.request_id,
             provider_id=metadata.provider_id,
@@ -181,6 +186,8 @@ class UsageRecorder:
             request_body=request_body or result.request_body,
             provider_request_headers=metadata.provider_request_headers,
             response_headers={},
+            # 失败请求返回给客户端的是 JSON 错误响应
+            client_response_headers={"content-type": "application/json"},
             response_body={"error": result.error_message} if result.error_message else {},
             request_id=self.request_id,
             provider_id=metadata.provider_id,

src/services/usage/service.py

@@ -40,6 +40,7 @@ class UsageRecordParams:
     request_body: Optional[Any]
     provider_request_headers: Optional[Dict[str, Any]]
     response_headers: Optional[Dict[str, Any]]
+    client_response_headers: Optional[Dict[str, Any]]
     response_body: Optional[Any]
     request_id: str
     provider_id: Optional[str]
@@ -223,6 +224,7 @@ class UsageService:
         request_body: Optional[Any],
         provider_request_headers: Optional[Dict[str, Any]],
         response_headers: Optional[Dict[str, Any]],
+        client_response_headers: Optional[Dict[str, Any]],
         response_body: Optional[Any],
         request_id: str,
         provider_id: Optional[str],
@@ -288,6 +290,13 @@ class UsageService:
                 db, response_headers
             )
 
+        # 处理返回给客户端的响应头
+        processed_client_response_headers = None
+        if should_log_headers and client_response_headers:
+            processed_client_response_headers = SystemConfigService.mask_sensitive_headers(
+                db, client_response_headers
+            )
+
         # 计算真实成本（表面成本 * 倍率），免费套餐实际费用为 0
         if is_free_tier:
             actual_input_cost = 0.0
@@ -351,6 +360,7 @@ class UsageService:
             "request_body": processed_request_body,
             "provider_request_headers": processed_provider_request_headers,
             "response_headers": processed_response_headers,
+            "client_response_headers": processed_client_response_headers,
             "response_body": processed_response_body,
         }
 
@@ -360,12 +370,13 @@ class UsageService:
         db: Session,
         provider_api_key_id: Optional[str],
         provider_id: Optional[str],
+        api_format: Optional[str] = None,
     ) -> Tuple[float, bool]:
         """获取费率倍数和是否免费套餐（使用缓存）"""
         from src.services.cache.provider_cache import ProviderCacheService
 
         return await ProviderCacheService.get_rate_multiplier_and_free_tier(
-            db, provider_api_key_id, provider_id
+            db, provider_api_key_id, provider_id, api_format
         )
 
     @classmethod
@@ -484,6 +495,7 @@ class UsageService:
             existing_usage.provider_request_headers = usage_params["provider_request_headers"]
         existing_usage.response_body = usage_params["response_body"]
         existing_usage.response_headers = usage_params["response_headers"]
+        existing_usage.client_response_headers = usage_params["client_response_headers"]
 
         # 更新 token 和费用信息
         existing_usage.input_tokens = usage_params["input_tokens"]
@@ -656,9 +668,9 @@ class UsageService:
         Returns:
             (usage_params 字典, total_cost 总成本)
         """
-        # 获取费率倍数和是否免费套餐
+        # 获取费率倍数和是否免费套餐（传递 api_format 支持按格式配置的倍率）
         actual_rate_multiplier, is_free_tier = await cls._get_rate_multiplier_and_free_tier(
-            params.db, params.provider_api_key_id, params.provider_id
+            params.db, params.provider_api_key_id, params.provider_id, params.api_format
         )
 
         # 计算成本
@@ -704,6 +716,7 @@ class UsageService:
             request_body=params.request_body,
             provider_request_headers=params.provider_request_headers,
             response_headers=params.response_headers,
+            client_response_headers=params.client_response_headers,
             response_body=params.response_body,
             request_id=params.request_id,
             provider_id=params.provider_id,
@@ -753,6 +766,7 @@ class UsageService:
         request_body: Optional[Any] = None,
         provider_request_headers: Optional[Dict[str, Any]] = None,
         response_headers: Optional[Dict[str, Any]] = None,
+        client_response_headers: Optional[Dict[str, Any]] = None,
         response_body: Optional[Any] = None,
         request_id: Optional[str] = None,
         provider_id: Optional[str] = None,
@@ -785,7 +799,8 @@ class UsageService:
             status_code=status_code, error_message=error_message, metadata=metadata,
             request_headers=request_headers, request_body=request_body,
             provider_request_headers=provider_request_headers,
-            response_headers=response_headers, response_body=response_body,
+            response_headers=response_headers, client_response_headers=client_response_headers,
+            response_body=response_body,
             request_id=request_id, provider_id=provider_id,
             provider_endpoint_id=provider_endpoint_id,
             provider_api_key_id=provider_api_key_id, status=status,
@@ -844,6 +859,7 @@ class UsageService:
         request_body: Optional[Any] = None,
         provider_request_headers: Optional[Dict[str, Any]] = None,
         response_headers: Optional[Dict[str, Any]] = None,
+        client_response_headers: Optional[Dict[str, Any]] = None,
         response_body: Optional[Any] = None,
         request_id: Optional[str] = None,
         provider_id: Optional[str] = None,
@@ -878,7 +894,8 @@ class UsageService:
             status_code=status_code, error_message=error_message, metadata=metadata,
             request_headers=request_headers, request_body=request_body,
             provider_request_headers=provider_request_headers,
-            response_headers=response_headers, response_body=response_body,
+            response_headers=response_headers, client_response_headers=client_response_headers,
+            response_body=response_body,
             request_id=request_id, provider_id=provider_id,
             provider_endpoint_id=provider_endpoint_id,
             provider_api_key_id=provider_api_key_id, status=status,